The graph represents the rate of two machines that fill water barrels. One machine has already filled 30 water barrels before th
e faster machine starts. According to the graph, the two machines will have filled a certain number of water barrels at about the same time. What is that number of barrels?
A) 45 barrels
B) 50 barrels
C) 80 barrels
D) 90 barrels
A) 45 barrels
B) 50 barrels
C) 80 barrels
D) 90 barrels
1 answer:
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Hope this will help you. It is a little hard to explain.
Step-by-step explanation:
You can write an equation of a line conveniently by point-slope form. It's in the form of where
is the coordinates of a point that's on the line and
is the slope of the line.
Now choose a point (It doesn't really matter which one) and plug that in the equation. I'll choose where
and
The next thing we have to do now is finding the slope, , where it's equal to
. I'll make
point 1 and
point 2.
Now let's plug that to our equation.
Now we have the equation but out of all the choices it seemed that all of them are in slope-intercept form all you have to do now is make our equation rewrite it in slope-intercept form.
is your equation.